This kids' DIY Slime Kit, originally listed at $39.99, drops to $16.99 at Zen Laboratory via Amazon. Shipping is free on orders over $25, for Prime members, or by signing up for a free Prime trial. Otherwise, it adds $5.99. This kit sells for $25 or more elsewhere online. It includes 18 different colored slimes, three cutting and shaping tools, two plastic straws, 12 vials of colored glitter, two bags of sugar paper, three bags of beads, and six bags of foam balls. Sales tax is charged in most states.