Many foam-style craft kits use self-adhesive, peel-and-stick panels or interlocking foam pieces that fit together like a puzzle, so no glue is required. That makes these kits a mess-free, child-friendly option.
Silicone molds are described as waterproof, odor-free, and durable, with a temperature tolerance from −40°C to 230°C. Listings note they are suitable for freezing, baking, and use with common appliances such as microwaves, toasters, and refrigerators.