On a pre-COVID trip to NY, my kids & I visited the Sloomoo Institute (aka "The Slime Museum") and got, well, slimy. I realize the slime fad has probably had it's day, but my kids still get a kick out of it. A new jar of slime has a short lifespan, though, which is where the slime subscription comes in. My son got a 3-month subscription as a birthday gift and got increasingly excited with each impending delivery. The unboxing of this subscription is super fun - it's got a healthy variety of slimes to experiment with, plus mix-ins, stickers, tattoos, and other goodies. If you're looking for a gift for a slime-lover, this checked all the boxes!