Do you have a program called Help me Grow in ur area? its a free service. they will come to your house and work with you and ur child and give u great ideas on how u can teach ur child new things. There moto is a parent is the best teacher for a child so it really helps. Even though im a great mom i still have them come cus the kids really enjoy the activites they bring.
One idea they gave me when my son was younger, was to tie a toy to a string and tie the end of it to part of there high chair (of course you would have to supervise so they wouldnt choke them selfs or anything) and whatch them trow the toy over and then figure out they can pull it back up from the string. (he might still be to young for this one though)
Also u can give him shapes and a container with a large enough opening and have him put the shapes in. it helps with hand eye cordination and helps them with grabing the items (again he might be to young, but a great activity for when he can) (we used clothes pins in a juicey juice bottle when he was a little older as it was more difficult for him with a smaller opening)