Hi,
another suggestion is a 'Cuskiboo ' this is the only NICU incubator toy approved by the NHS, i had one for my baby while he was in the NICU and he loved it and still does, its a little comforter and great for mums too as mum can take away get there sent on them and back to baby and so on, which is great for baby development, i got mine from amazon was about £15.00 but i found a great and really thoughtful present.
xxx