NTT - passive and shy. Once they settle in they do get personable. Best gold/yellow colors, but have a reputation for Sudden Death syndrome after hitting 10” plus. I’m currently growing out 2 4” but have had in the past. One died at 8” and others I sold off (6-7”)
AT - American tiger. Silver dat. Have a reputation for not making it pass 10” in size. Perhaps, the debate for them requiring salinity holds true. I’m on my 3rd Silver (9”) and none have made it past 10”.
NGT- is the best brightest one with the yellow and black bumble bee. Always stable but the biggest potential
***. It's the jardini aro of the bunch. Current one is about 13” but sold off others half the size.
IT Indonesian - the most common. The least shy. Solo is the way to go with them to be be stable. They tend to go unstable in a group imo. You may get frustrated if U get one that stays dark (unstable) 50% of the time, or hides. It's a toss up but odds of a more stable one is a solo indo w/cichlid type tankmates. This may your best route.
Overview : Datnoids are a personable fish. Will follow your son from side to side for food. U can hand feed up top. U can hold out of the water for some bodacious photo ops ;-) Target one about 6” and will hit about 12” in a year, but slows way down after that.
Quick Clip of mine. Got all 3 at large sizes In order: 13” yellow indo, 15” brown Indo, 13” New Guinea