Kieron & his spelling

Kieron is doing good in school and at home.. We let him learn 1 word spelling each night. He's now able to spell One, Two, Three & Four. His memory is really good, he's able to memorise 1 word within 1hour. How to test he's able to remember..? Pop out the question to him "How to spell three?" at anytime of the day. keke...

But he has a "stepping stone" at home that always distract him ---> Kayden