I would be glad to post pics up here after Halloween-I made Jasmine the Dorothy blue/white gingham checked dress, found red glittery ruby slippers online, and got her the blue hair ribbons and blue fold down socks...For Raiden I found a huge lollipop at Cracker Barrel, blue striped tights at Baby Gap, and made the shorts out of light blue knit, and the top out of blue and white plaid material, with the pieces cut so the plaid is diagonal like the munchkins, and not up and down/side to side. The biggest pain has been altering it all to include the ragged zig-zags on the ends of the shirt bottom and sleeves, and the shorts-so that the seams are all finished and nothing is crooked. I have also had to treat the edges so they won't fray. I made a loop in the shirt to hold the lollipop so he won't have to...and I need to make a yellow bow around the lollipop handle. (I am a stickler for proper details!!! ) I will also have to include our costumes in these pics. (My husband and I) I am finishing up the last stages of my husband's stormtrooper (Star Wars) costume-complete with voice changer and everything-I have been workin on it for a year now-it is movie quality. When we go trick or treating with the kids-we get about as much candy as the kids-and the older people especially just love us...they really enjoy it and that makes it totally worthwhile! We get a lot of old women coming to the door with candy and then yelling "Morty, you have to get in here and see THIS!!!!"
As far as the bag of jellybeans-I would try to find a large clear bag-try the local UPS, Post Office, ect. because they usually have them for packages they have to leave on a rainy day. You want to fasten it at the neck level obviously and not put it over his head...

And I would just fill the bag with small blown up balloons in jelly bean colors, and then have "jelly beans" written on the front side of the clear bag-like with those stick on letters they sell to put your house name and number on your mailbox.
I have also seen a cluster of grapes done this way...where the kid wore a purple sweatshirt and pants and fake vines were attached on the head and neck area, and small purple balloons were blown up and attached to the suit all over by using safety pins on the excess little piece at the end of the knot. Make sure the child pees before putting any of the balloons on either costume!
Aphil