DD's has gradually ramped up over the years. She's now 10 and doing something most days (is very energetic and in need of constant entertainment / movement though, children definitely vary in this regard).
Monday: singing
Tuesday: piano lesson (at school), ballet, tap, street dance
Wednesday: Swimming
Thursday: choir (at school), ballet, guides
Friday: commercial dance
Saturday: musical theatre
Sunday: mostly blissfully free but sometimes involves rehearsals for shows.
She has tried various things over the years but has v much got a thing for the performing arts now. Also absolutely loves guides and finds swimming very regulating but hoping to drop swimming soon to get another free day. Though if a free slot appears she will definitely want to add more dancing.
We only have one which makes the ferrying her around easier.
When she was the age of your two it was swimming lesson, brownies, ballet, piano and choir (both of these last two at school) so only 3 activities after school during the week. She started off with just ballet and swimming...