If you actually want to sit on the beach at your resort on Bonaire there's about 2-3 that have that.
And let's be real - the road along the beach is miles of ironshore with small patches of sand with irosnhore/coral rubble off shore - I'm sure they don't want to shred the childerns feet. Or make them wear dive boots.
Compared to maybe a dozen resorts on Curacao. And probably double that many nice, sandy, low current beaches.
Also I can name all the non-dive things to do on Bonaire on one hand.
Bonaire is also a beyond flight and often 2nd connection from a larger hub. Not too fun with an infant.
Some of the other destinations mentioned might even be direct flights depending on the OP's origin. Assuming it's SFO - that puts at least 3 Hawaiian islands on the map as long but direct flights. Get the kid(s) settled down and let them sleep till you get there. It's what we've done in the past with my 2-4 yr old niece on family trips.
Or 1 stops thru Houston, Dallas or Charlotte (to the Turks/Caicos.) to some of the more popular destinations that offer good diving, great beaches and other amenities.
What Damselfish said...I wouldn't even take my parents to Bonaire alone as they'd be bored by the 2nd day. And they're pretty easily amused.
Let alone with small kids?