Simple poster board columns! Tape 2 poster boards end to end on the inside w/ packing tape. Roll into a cylinder & tape. Add 9" and 12" pizza boxes on top & bottom ($45 for 100 @ Amazon!). Can make 50 columns for $70! Nearly 6'tall & Lightweight. Add a box to bottom covered in white paper for taller columns.
Torches for Kingdom Rock VBS. Cardboard poster tubes cut in half & spray painted black. Red, orange & yellow napkins for flame. Attach to wall with command hooks & paper clips to slant away from wall.
Recycle pop bottles into planters - I think these look like goblets. ( Kingdom Rock VBS?)
Pool noodle "javelin" throw