Puzzle storage - "Buy some legal size poly expandable envelopes. Remove the string and replace with Velcro circles. Place in a bin. My rule is one out at a time. The envelopes are easy enough for my two year old to open and clean up himself.
SCIENCE FOR CHILDREN-Having already done this, it was a great addition for sand and sensory for even toddlers. Developmentally appropriate for children of all ages depending on what is added. Will abs (How To Make Slime With Flour)