Billy, As is said in farming country, Having CP is a tough row to hoe. I feel for your son, as I have minimal impacts. Slight physical impairment, I walk with forearm crutches, etc. But being new here, most will learn, I'm a stubborn cuss, and I hardly give up on anything.
I'm sure I'll become a pest to those in the know, but I love to learn, I love a challenge and I never say I can't. That last one, get's me into real scary situations sometimes, but I've got one watching over me that I'll do my best to shine bright for.
I just got this kit and I've put probably twelve hours in over two days. I've got a lot of goofed up scraps lying around, but I've had a blast.
Take care brother,
God Bless, Ray