I agree with Rick about the Appearing Cane and the Appearing Straw. The effects are too similar. Just do the appearing cane.
Also, you can routine the Appearing Cane into the 20th Century Silks. That is, use the Appearing Cane to vanish the silk. Then, for the Dove Pan effect, use the cane as a magic wand (credit to David Ginn for that one). Like Rick said, you want to tie the effects together. That way, it looks more polished.
I looked at my notes from a kids Halloween party (ages 3 to 7) that I did last year. I did the Cups & Balls (with the eyeball final load), the orange and black sponge balls to sponge Jack-O-Lantern and the following two effects:
~Zombie Ball - The Zombie Ball is introduced as "Z". Z is covered with a black silk. The kids chant his name and he slowly rises. Z then starts "wandering" away until I drag him back. Z then "tells" me that he can't see. I then hold the silk and he floats up from behind the silk in view of the audience. I then try to make Z disappear, except he pops up over the silk into view each time I start counting to three. Finally, he actually "disappears", only to peak out from behind me (at which point the kids yell out and point). I then make him reappear under the silk and float back to the table.
~Silks to Spiders - I started talking about how spiders are scary but that I wanted to make some purple spiders appear. I told them I had a red silk, but didn't know how to make a purple. Of course, the kids all shouted you needed blue. I tell them that I lost my blue handkerchief, but one of them yells out it is in my jacket breast pocket. I then select an assistant to help me and do the break-away wand routine, eventually loaning the volunteer my wand. The red and blue silks are changed into a purple silk. I then show the change bag as being empty (unzipping and putting my hand through it). My assistant then put the purple silk in, said the magic word and changed them into 12 purple toy spiders (there was 12 kids at the party).
The Zombie Ball shows a presentation of strong magic, but made kid friendly (be warned, the kids wanted to come up afterwards and pet "Z"). Since then I've had Z take a nap afterwards so that I could put him away.
The silk to spiders illustrates what Rick is saying. You can make a really simple, but fun routine with stuff that you buy at Wal-Mart or Target and a couple of magic props.
A couple of other ideas -- how about a signed card (Jumbo if possible) to a pumpkin? Or an effect where someone picks a card (again Jumbo if possible) and you have the image disappear from the card and appear on a pumpkin?
Also, you could do a gag about eating too much Halloween candy making you sick, then pulling out a 25 foot mylar mouth coil and then making a joke about not eating the wrappers next time.