Yo. when my son was younger i picked him up some animated Bumper Battlers and he loved them to bits, he also had a powerbots bumblebee (which remains the most annoying toy ever) which he also liked. However as toys he's kinda outgrown them a bit and wants more challenging stuff, which is pretty cool. He is three now and has started to take a strong interest in Daddy's robots, so i gave him a few movie 1 legends i had kicking around, and whilst he's super excited about them (octopus prime being his favourite ) he's predictably crap at transforming them. I realise all parents say this, but he is actually very bright for his age and totally gets the concept and stuff, he could immediately transform bumblebee, jazz and prime without being shown how, but he's not quite dexterous enough to fold out little feet, avoid popping ickle balljoints and balance flimsy figures to stand up so he gets a bit frustrated. Ignoring his specific age (i won't give him anything that is dangerous for him or will cause him to rage, and he really is quite bright) what TFs are available at the moment that are durable, have simple transformations but are still satisfying enough for a little to see that it's gone from a lorry to a robot?