This looks worse than the £15 Sega handheld I got my daughter for going on holiday (so I didn't care if she lots it). Ended up being rather good and she loved Echo the dolphin etc
No instructions in the box is not a problem, I think kids excel at figuring things out and get a kick out of it. I'm sure many of us on here are OLD at 35+ and remember having to figure out how games worked ourselves. I still remember the eureka moments with games like Deuteros.