Gross Motor: The weaving through a rainbow activity after reading Don Freeman's book A Rainbow of My Own provides for active engagement and probably some motor challenges. Clear some space and let the fun times begin!
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.