For little kids 1 through 10 is too many numbers to remember.
5 is just about right, so let's make a simple game out of it.
Counting to 5 is almost like adding to five so let's through learning addition into it as well.
Voice interaction is through Amazon Echo using the skill I wrote called:
Skill was adapted from an the Alexa Skills Kit sample called Chemistry Flash Cards located on github.
Kids can interact with the skill like this:
Alexa, open SimpleAddition.
What is 1 + 2?
What is 2 + 3 ?