Rope routines are great. If you have some money to spend, Linking Rings are fun too. If you're choreographing to music, try appearing/vanishing candles? Very elegant. If you're talking with audience, funnily enough, the Egg Bag is killer.
EDIT: Thought of more things. Miser's Dream is a fun one because of the audible noise.
And nearly every single thing on this list requires an exceptional amount of practice before one is considered "fair" let along "good". . .
I know people that practice ring routines for over 3 years before they started performing them in live shows, just for the sake of having proper control and an "artistic" feel to the presentation.
To the OP. . . why are you asking for suggestions?
If you do not have material in your arsenal at this point in the game YOU ARE NOT READY FOR A COMPETITION especially two months out. So look at what you have now and what you do well. I happen to know first hand that the Wilson Course will give you more than enough material for a Talent Show BUT, you needed to know it and been rehearsing it months ago if you want even a glimmer of hope to win; especially in today's world where magic is looked down on by so many.
The Second Reason I'm saying this is that no one here knows you, your character, style, vision, etc. so how can we suggest material that would be appropriate to you; effects that will "fit" you, so to speak?
Other considerations are your age as well as the age you appear to be (two very different things. . . I got cast as a teenager well into my late 20's) and too (and probably most important) the style of magic you see yourself doing; not everyone can go out and do a Dancing Cane routine ala Fred Astaire and make it enchanting but similarly, not everyone can look like Harry Potter and present an effect or series of effects akin to Micky and the Sorcerer's Apprentice.
Go Back and look at your existing material and use what you know and if possible, what you have on hand.