Outschool - recommendations?

[ColouringPencils]

My kids have just done an hour-long class on Outschool and really enjoyed it. I am looking for recommendations, possibly around computing/coding/gaming/science for my 10 year old. Ideally a class that lasts several weeks to give us something to do in the last half term. Any suggestions?

Also, the children in the class they took part in all seemed to be younger than the age range. Is that normal? Should I book him into a slightly older class? I notice a lot of them are eg 7-11, so he would definitely be one of the older ones in that group anyway, but 12-15 might be way too advanced.

Thanks!