We have had a trampoline in our back yard for a total of 15 years. All of our kids have loved it. Having a trampoline has honestly been one of the best parenting decisions we have made. I feel that not only is it good for the vestibular inner-ear development (read more here) which is very important for future coordination and balance etc., but it is just such an easy thing to do to get energy out when tension builds up. The developmental benefits are rich but the bottom line is that it is just really FUN! The last one we got (Jump Sport) is very heavy duty and they have all been very safe.
Every child should know how to jump and jump well. The new tramps offer awesome safety features so don’t be too worried. We have one with a game design (boxes with shapes and numbers) printed on the bottom so the kids make up their own games. Adding a ball to the tramp game is an awesome way for your children of all ages to get their daily requirement for movement!