I have four boys, and struggle to get them all involved! We are starting over on a new, .25 acre property, and my (pre)teens are not at all interested. Ages 2 thru 7 always want to be put with me, but 11 hits and it's a chore.
Briana you might find this thread helpful City Kids Turned Farm Kids there are a variety of different ideas in this thread. Maybe some of the ideas could work for you.
“No hour of life is wasted that is spent in the saddle.” Winston Churchill
The human mind is a dangerous plaything. This tiny ad is pretty safe: