My boss's 3yo is having open heart surgery next week.

What are some good gift ideas for him and/or their family? I need to procure something by Tue to give to my boss at the office on Wed.

I have know my boss for six years and worked for him for four. He has gotten me promoted twice, got me a nice gift when my son was born, and was very supportive during my last pregnancy and maternity leave and so far has been great during this pregnancy too. So I would like to do something nice, and it's ok if it is a little spendy.

They also have an older daughter who I think is around 5 now. I am happy to get something inclusive for her too. I sometimes get an older sibling gift when I get a baby gift. Not sure if he same thing applies.