From TRU - the prizes are limited to just 5 states because of the Movie tickets (perhaps there are no participating theatres in ACT, TAS & NT), or they could only afford 5 packs of prizes.

The competition is only open to those states – as these are the states we have been allocated tickets for.
ACT will definitely be grouped with NSW. But for the other 2 states, unfortunately we do not have tickets.

If they wish to enter with a different state, and want to travel to the state they have won tickets in, that is entirely up to them. However we aren’t permitted to write that in the terms and conditions.
So those outside of those five states can still enter, even if you can't use the movie tickets, you shouldn't miss out on the chance to win free toys.