How long are you a beginner? There are certainly different levels of beginners.
For those who can just about crochet single crochet stitches and spiral rounds, I recommend these great
fruit-shaped coasters :

They are best crocheted from cotton yarn in the appropriate colors and are really child’s play. The coasters can also be used as glass covers to keep wasps or other insects from falling into your glass. A standard-thickness straw fits through the hole in the middle. That way, your drink is well protected.
If you prefer crocheting in rows, you might enjoy this little project:

The
ghost bookmark is quick to crochet using a few white and black leftover yarn scraps. The wavy body is created by regular increases and decreases.
Ready for a bit more of a challenge? Then why not try doll clothes!

The off-the-shoulder
rainbow dress for fashion dolls is perfect for using up lots of small, colorful leftover yarn scraps. You can make it in a short and a long version. The pattern for the little drawstring bag is also included.