like others have said if your children are 10 and 9 and 2 and your older 2 do not need you to help them with every thing they can do rides together with you in the set behind them I do not think the older 2 can do any rides the youngest one can not do so no space mountain since they will not allow you to do in the line with the youngest one and they will not let your kids in line with out you so I would let them know this ahead of time. but I think you could have a good trip for the day I would do MK if they like rides or EPCOT if they are in to shows and people form different cultures, animal kingdom if they are into animals and hollywood if well holly wood is not that great of a park right now so