Heres the thing...
my dad constantly gets mad at us leaving the lights on all over the house (kitchen, hallway, toy closet) and he always blames it on me even though its usually not my fault. I saved up some money in hopes of getting it...
Tuicemen's nailed it! The Firecracker Kit is where I got my start. It's easy to set-up, and cheap. The "socket rockets" are definately the way to go to "get your feet wet in the sea of HA (home automation) products". Like Mystyx said: "maybe your dad can change a wall switch". If you wanna go that route instead of the "screw-in simplicity of the socket rockets", please don't get "over-enthusiastic" and try to do any house wiring on yer own!
Your Dad will be proud of your thoughtfulness. You don't wanna make him mad at ya fer burnin' down the house!
Or worse yet, causing harm to yerself!
I admire the way your handling your "share of the blame" by stepping-up to the plate and seeking-out a solution to the situation. It shows a level of maturity that yer Dad will be proud of, not to mention you'll be a "hero" in your sibling's eyes for getting "the grouch"
off their backs!
Good luck... and save yer pennies! Once you start, there's no turnin' back!
Frank