Welcome Michael,
It's so important to keep your son interested in the hobby, like Paul and Steve said.
When I was young I had a really hard time using a scope like this and was put off. It wasn't until years later that I came back to astronomy.
When it was time to buy my 8 yr old daughter a scope, I decided to go with a dob style scope for the reasons that Paul outlined.
Now it's her favourite and uses it all the time with ease.
Hope this helps.
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