oscarbaby

Hi I have a very musical 17 year old who has a Macbook Pro with Logic on it. He composes but also plays electric guitar, bass, piano and drums. I wanted to get him something for Christmas that would work with the gear he has already got - he's really into dance music but does also play classical etc. Is there something that would allow him to do more enhanced mixing or composition with Logic or something that would allow him to record his digital piano/electric guitar etc straight into Logic? Sorry if my lingo is all wrong just any ideas and recommendations would be hugely appreciated. I don't have a huge budget this year so anything between £30 and £150 ideal level. Thanks so much all of you in advance!