Kids at ultrasound???

Julie • Expecting twins after IVF :)
We have a 5 and 3-year-old (both adopted). This is my first pregnancy and it's been a loooong journey to get here so we are extra excited and trying to involve them where we can. Is it appropriate to take kids to ultrasounds? And would I even want to for my 6-week since it's so early and the baby is so tiny?