My girls have bunk beds. DD7 sleeps on the bottom because that is the full sized bed. DD4 sleeps on the top. She does just fine. I say go for it!
DS and DD had bunk beds when they were 2 and 3 years old. your boys should be fine
Quoting MandaJo111:
My girls have bunk beds. DD7 sleeps on the bottom because that is the full sized bed. DD4 sleeps on the top. She does just fine. I say go for it!
They have this bed:

It is also available in pine

Didn't work for our girls... but the 4 yo at the time is a sensory seeker. We got beds that "T"ed and she had the bottom, but would climb to the top to jump off down to her bed. We had to pull them apart.




