Magnetic number fishing, they add what they catch! As well as addition, develops hand/eye coordination, fine motor--I love this for magnetic letter fishing too! When they catch a letter, they say its name and sound.
This word building activity travel kit is perfect for toddlers and preschoolers for road trips and long car rides and you can customize it with sight words, color words, word families, or whatever your child is currently learning. Great for a summer learn
Building Number Sense Number Line Whack is a fun way to practice identifying numbers. Give your students a number line and a fly swatter. You can have your students just find the different numbers or you can make it a little trickier.