Make sure toys are wiped clean and that all pieces are gathered and packaged together. Include batteries (if required) so that we can test them. We always check battery compartments to make sure they are free of corrosion.
Clean THOROUGHLY - the newer it looks the more you make. Bring in instruction booklets if you have them and make sure you include all pieces and accessories. BONUS points for teaching us how to assemble or use items that are new to us!