What little kid doesn't like playing with squishy, ooey, gooey, things? What adult doesn't? This sensory activity is so simple, and is also a CLEAN activity, which is nice once in a while, isn't it?
In a bag place:
*Hair Gel (you can find some at the Dollar Store)
*Googly eyes (also at the Dollar store)
Seal the bag. You can add extra strength by sealing the top and/or sides with masking tape or duct tape, as well.
Then, let your child have some fun! It's mess free, frugal, and fun!