You can make one of these by sewing clear plastic squares together and filling with rice and the hidden objects. They are really fun and great “toys” to take in the car or anywhere kids have to wait quietly.
I like the idea of sewing them, as I’m sure the Ziploc bag would be opened or broken in no time at all. However, I’m not sure I could get a seam that would prevent the gel and glitter from squishing out the sides.