I assembled this spider & web costume as follows:
Baby - black, long sleeve onesie, black pants, black spider hat (found at Babies R Us, Halloween bib optional if you have a drueler like mine, socks to keep the toesies warm
Mom - black, long sleeve shirt, black leggings, black socks & shoes, Halloween stretchable cob webbing
Carrier - baby carrier, spider web rug (dollar section at Target) or black fabric with cob web stretches across, safety pins
Dress baby & mom all in black, stretch cob web all over mom, put baby carrier on, use safety pins to pin spider web rug or black fabric onto front of carrier, put baby in carrier - be sure the safety pins are in a safe place where baby can't accidentally unpin them. Add spider hat. Viola! Cutest spider and web EVER!
We had many compliments on this and had over 75 Facebook Likes in 1/2 a day.