1. Explain it simply
有点儿 means 'a little / a bit' and goes right before the adjective.
It's almost always used for something mildly negative or unwanted, like being tired, cold, or expensive.
2. Show examples
我有点儿累。
Wǒ yǒudiǎnr lèi.
I'm a bit tired.
有点儿 + adjective
这个菜有点儿辣。
Zhège cài yǒudiǎnr là.
This dish is a bit spicy.
Describing food
今天有点儿冷。
Jīntiān yǒudiǎnr lěng.
It's a bit cold today.
Describing weather
3. Share a tip
Save 有点儿 for things you'd rather were different. For plain, neutral degree ('a little pretty', 'a little fast'), Chinese uses 一点儿 after the adjective instead.