This page lists good toddler math resources that I've found on the internet.
They're organized by the age at which they became accessible to my granddaughter (Alex).
Alex had a lot of fun with this! (See the short video at right.)
Use a touchscreen to ‘wake up’ the sleeping critters.
Then, ‘open the door’ for them to enter the tree.
Update:
After a couple days, we were no longer able to play the game without a paid subscription. Argh!
This was the only game I saw that was suitable for her at this age, so it's not (for me) worth the monthly fee at this time.