If you're looking for a cute autumn decoration, these acorns are simple to make and look great in a bowl or scattered around a table. I found these acorn tops under an oak tree at a nearby church, but if you don't have oak trees in your area, you should be able to order some on Etsy.
Colorful Crocheted Acorns Pattern
3.5mm crochet hook
Scrap worsted weight yarn
Hot glue gun
Sc - single crochet stitch
St - stitch
Inc - increase
Sc2tog - single crochet decrease
Work in continuous rounds. Do not join rounds.
Round 1: Make a magic ring. Sc 4 in the magic ring. (4 st)
Round 2: Inc around. (8)
Rounds 3-4: Sc around. (8 st per round, 16 st total)
Round 5: *Sc, sc, sc2tog.* Repeat from * to *. (6)
Fasten off. Weave in ends and stuff into inside of acorn. Using hot glue, glue open end of acorn into acorn top. Repeat to make many acorns!