Activity toy - NB needs attention (Marton)

This is a new, unused, activity toy. Daughter gave me a link to it for a Christmas present for her son - but it turned out to be a Chinese 'knock-off' site. The main concern I had about this toy was the little clips on the backplate (see 2nd photo) which seem hazardous to me - so gift was not given. Keys were also supposed to be attached via a chain (to operate the lock mechanism in photo 2) but just came loose. However, perhaps someone could adapt this and make it safe?