Question 1

Do kits arrive sealed and brand‑new, or have customers reported receiving opened/previously used or repackaged items?

Accepted Answer

We ship the National Geographic Mega Slime & Putty Lab as a brand‑new kit; the listing notes it’s a “brand new, open box” item so the outer box may be opened or show minor damage but the slimes, putty and tins are new and quality‑tested. Customer reviews also report the item arrived looking brand‑new with no reports of previously used products.

product_description; customer_reviews

Question 2

How much slime/putty is in each reusable tin (weight or volume per tin and total product quantity)?

Accepted Answer

We don’t publish a net weight per tin. The kit’s instruction manual and some retailer listings show the whole kit weighing about 1.76 lb (≈800 g) (other retailer listings vary between ~1.0–2.0 lb), so evenly dividing that total gives roughly ~100 g (≈3.5 oz) of product per tin and ≈800–900 g total — but that is an estimate because the published “item weight” includes the DIY ingredients, magnet, UV light, tins and packaging, not just the slime in each tin.

Question 3

Are the metal storage tins airtight or leak‑proof (do they have a sealing gasket), and are they safe to use long‑term with slime inside?

Accepted Answer

We describe the eight metal tins as “airtight” in the official instruction manual and the manual instructs returning each slime/putty to its airtight storage tin and ensuring the lids are securely closed. The manual does not mention a rubber gasket or specific sealing mechanism, so the airtightness appears to come from the lid fit rather than a visible gasket. For long‑term use the manual recommends keeping the tins in a cool, dry place away from heat and always closing lids after play to minimize drying and help the slimes remain usable. [1]

Sources

[1]NATIONAL GEOGRAPHIC Mega Slime Kit & Putty Lab Instruction Manual (manuals.plus)

Instruction manual for National Geographic Mega Slime & Putty Lab (manufacturer/Blue Marble) on manuals.plus

Question 4

Does the DIY glow‑in‑the‑dark slime lab include all required ingredients (activator, glue, chargeable glow pigment) and the stir stick, or are additional household supplies required?

Accepted Answer

This kit includes the DIY glow‑in‑the‑dark slime lab and a stir stick, and the product page says kids can “make their own with the DIY ingredients and supplies.” However, the listing does not itemize consumables (glue, activator solution, or a chargeable glow pigment), so we cannot confirm that every required ingredient is included — you should plan to have common slime supplies on hand just in case. [1]

Sources

[1]NATIONAL GEOGRAPHIC Mega Slime and Putty Set — Blue Marble product page

brand product page (Blue Marble / National Geographic product listing).

Question 5

Are the premade slimes/putties free of common irritants (borax/borate concentrations, formaldehyde, phthalates) and are they labeled hypoallergenic or dermatologically tested?

Accepted Answer

We label the National Geographic Mega Slime & Putty Lab as quality‑tested and non‑toxic, and the brand has stated on the Target product page that the premade slimes contain less than 0.06% borax; independent third‑party testing is reported to verify compliance with U.S./Canada toy chemical limits. The product listings and official Blue Marble product page do not declare formaldehyde‑ or phthalate‑free status and the kit is not labeled “hypoallergenic” or “dermatologically tested,” so we cannot confirm those specific claims from our product materials.

Question 6

Does the magnetic putty contain embedded magnets or magnetic particles that could separate and pose a swallowing hazard, and what precautions are recommended?

Accepted Answer

We use a ferrous (iron-based) magnetic putty — the magnetic effect comes from microscopic magnetic particles suspended in the polymer, not from many loose embedded magnets, and the kit also includes a separate play magnet to demonstrate the effect. The particles are bound in the putty and do not normally flake off, but you should keep this kit (and the small magnet) away from young children, follow the 8+ age guidance, supervise play, store putty in the tins when not in use, and avoid putting any putty or magnets in the mouth; if ingestion or swallowing of a magnet or metal object is suspected, seek immediate medical attention.

Question 7

Will any of the slimes or putties stain clothing, carpet, upholstery or skin, and what cleaning steps or solvents are recommended for accidental stains?

Accepted Answer

We test and label this kit’s formulas non‑toxic, but the colored, glow and liquid slimes can still transfer dye or leave a sticky residue on clothing, carpet or upholstery if left to soak in. For spills: scrape or blot off excess (don’t rub), then blot with dish soap + water or an equal‑parts white vinegar/water solution, rinse and launder per the garment’s care label; for stubborn putty residue try isopropyl rubbing alcohol (and, only if needed and spot‑tested, acetone on small/robust swatches) before final washing. Skin cleans up readily with soap and warm water; if color persists, gentle hand soap or rubbing alcohol and a rinse usually removes remaining dye, and for delicate upholstery consider professional cleaning.

Question 8

How long does the glow effect last after 'charging' the glow slime (approximate minutes/hours of visible glow) and how bright is it in typical indoor lighting conditions?

Accepted Answer

We recommend “charging” the DIY glow slime or glow putty under a bright light (or the small UV lamp included) for several minutes — the kit instructions note that longer exposure produces a brighter, longer-lasting glow and suggest about 5–10 minutes if the glow seems weak. After a full charge the glow is strongest immediately and is typically clearly visible for about 30–60 minutes, then fades to a dim afterglow that can persist for a few hours depending on how brightly it was charged and the pigment used; in normal indoor lighting the effect is not noticeable — you need a dark or very dim room to see it well.

Question 9

What is the recommended minimum age for safe use (e.g., 3+, 6+) and are there choking hazard warnings for small parts like tins, lids, or the stir stick?

Accepted Answer

We recommend this kit for children 8 years and up. The set contains small parts (metal storage tins/lids and a stir stick) and magnetic putty (magnetic pieces), so it carries choking/swallowing warnings — not for children under 3 and magnets can cause serious injury if swallowed; adult supervision is advised.

National Geographic Mega Slime & Putty Lab - 8-Variety STEM Science Kit with Storage Tins & Learning Guide

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