Oops, didn't realise you not quite got to the contact sport stage yet
She be fine, there's plenty of things you can do, to help keep her tiny mitts off the pump..
All pumps can be locked, so that tiny exploring fingers, pressing buttons can't self-dose themselves.. But there are a lot of other things you can do, to further limit her playing with the pump or pulling out the cannula's..
You can get harness/vests that hold the pump around the back of a young child, but you can easily sew baby socks into clothing to make little pockets..
Cannula's can be sited the top of her buttocks, so it's harder for her to remove the cannula..
You can also, make a little safety loop with the tubing, which is just looping the tubing, and sticking it down with a bit of malpore (sp) tape, if she dugs or catches the tubing, the loop takes the force first, and the cannula stays put. You can even just put a little tape over the tubing near the cannula as an extra preventive measure.
If you get a choice of pump, I would go for one with a remote to it, such as the Roche Combo, as you can sort out bolus's etc without having to touch the pump, just be near enough to sap the pump to tell it what to do..
A good thing about a pump, is once she starts to go to nursery you find that carers/teachers aren't so afraid of dealing with a pump, as they are with injections..