DIY Sand and Rock Box by FSPDT. Gdjk -> made this with toilet rolls (aka tunnels) and moon sand instead of play sand. My son loved playing with it. The moon sand cleans up nicely indoors but play sand will be easier to play with when using the small cars.
Here is a huge collection of our favorite math and literacy learning activities for preschoolers and 4 year olds). So many ideas for hands-on learning and play! Literacy Activities Go on a Detective Alphabet Hunt – Hunt for letters with a magnifying g