They get to choose the toy (for them to think wisely of their decision) but I get to decide when they are given the chance to choose one. It’s good to set limits e.g only get to buy one toy a week. Or two toys a month.

Well, he will request for it. Then I will ask why do you need that. If not necessary, he won't want to get the toys again..

My kids are a little older now, so they get to have a say in what types of toys/games they get.

Both of us but mostly the decision is inclined towards my child’s preference:)

I would say both? The decision by my child to buy will be on his / her birthday.

I'll let her pick what she wants only if she has earned it

Through subtle persuasion and sometimes down right plea

Both! No point buying a toy she doesn't want to play

I need to guide my son in making the right decision

Sometimes I will allow my son to make the decisions