Not sure about Aldi but my good lady bought 2 kids helmets from Lidl last week. £6.99 and we are really impressed. I dont think the quality for that money can be beaten. More importantly the kids loved them so we wont have a battle trying to get them to be worn
Hm. On the basis that you get what you pay for, looking for a bargain when it comes to crash helmets is probably a bad idea. Bit like loo roll. You can't spend too much money on loo roll. Cheap loo roll = high poke through risk; cheap crash helmet = high dead kiddie risk