These are essentially happy looking emoticons with an open mouth.  You can also use 艸 to make it look like the emoticon is covering its mouth with its hands.

 

(*´艸`*)(●´艸`)。゚(TヮT)゚。
“ψ(`∇´)ψ( ´∀`)( ´艸`)
(・∀・)(;-◞౪◟-)(。 >艸<)
(*・艸・)(*≧▽≦)ノシ))(*≧艸≦)
(^v^)(>y<)(⌒▽⌒)
(◎ヮ◎)(ノ>▽<。)ノʕ̡̢̡̡̢̡̡̢♡ᵒ̴̷͈艸ᵒ̴̷͈॰ʔ̢̡̢̢̡̢̢̡̢✧
Σ (੭ु ຶਊ ຶ)੭ु⁾⁾ꉂ (ᵔ̴̶̤᷄ꇴ ॣᵔ̴̶̤᷅⌯))л̵ʱªʱª⁎*.*
(* ˚᷄ 艸 ˚᷅ *)(੭ु˙꒳​˙)੭ु⁾⁾(˵¯̴͒ꇴ¯̴͒˵)
Σ(꒪ॢ∀꒪;)՞л̵ʱªʱªꋧ(⁎ˊ̭ સˆ̀)◞₎̵₎꒰*⑅˃̶͈ ৺˂̶͈⑅꒱੭ु⁾⁾·°
((ꉺꈊꉺ)ꀢ༣ (⌯꒪͒ ૢ∀ ૢ꒪͒) ੭ੇ(⌯˃̶᷄ ᴗ̂ ॣ˂̶᷄⌯ั)
∗˚(* ˃̤൬˂̤ *)˚∗✧(σ๑˃̶̀ꇴ˂̶́)σ∗˚೫˳(●ᴖ͙̏ᴗॢᴖ͙̋●)˳೫˚∗
٩̋(๑˃́ꇴ˂̀๑)(ᗒᗜᗕ)՛̵̖(ꐦ ´͈ ᗨ `͈ )
ꉂ (๑¯ਊ¯)σ⸌̷̻ ( ᷇๑ॢ˃̶͈̀ ꇴ ˂̶͈́๑ॢ) ⸌̷̻(˃̴̀ᄇॢ˂̴́ ∗)
ᵵ (ૢ˃ꌂ˂⁎)Շ^(੭ु റ̆ ˒̫̮ റ̥)੭ु⁾⁾ꉂ ꀞꀞꀞ(ᕑᗢूᓫ∗)˒˒
✬̴⃛꒰⁍̴ꈊ ॢ⁍̴⌯꒱