guitar or cello

I wish my children would play musical instrument, but I think they really do not like it. My son has a guitar, but he seldom play on it. I asked him onetime if he likes to take a guitar lesson, but he never say yes. He was not sure yet of what he really likes. If he cannot learn how to play guitar, how he can learn to play the cello at wwbw. I really like to see other child playing musical instrument, but I think not in my family. My daughters both like dancing not singing so music is not really in the family.