Very sturdy, my son loves it! The seat is big enough/sturdy enough for me to sit on comfortably. He is short for the chairs (2yrs) but with a small step stool underfoot he is able to do fine motor tasks with good posture sitting on the chairs and is perfectly happy standing to play at the table. I bought it for my son to grow into and I am very happy with this piece and I believe I will have it for a long time.