How would you like an activity for your kiddos that is inexpensive, educational, AND fun? Look no further than your hubby's can of shaving cream! Squirt a nice-sized mound on the table in front of your little one and watch them get to work! You can use this as purely a sensory activity for the younger ones, letting them squish & squash to their hearts content (with supervision, of course)! Give them toy cars to drive through it or cookie cutters to make patterns/designs in the foam.
For older kids, you can have them draw pictures, practice writing their name, letters, numbers or word wall words. When I taught kindergarten, I would do this activity on one of the last days of school every year (I forgot to do it in preschool this year) and the kids would rave about it the rest of the day! They would each take turns (at their table) choosing word wall words or classmates' names for the other kids at the table to write.
And best of all, as the kids are playing, the foam dissolves into nothingness and leaves your tables sparkling clean! That works for me!