Fold with Rectangular Origami（A4/B4)  
 
-Very Easy -Easy -Neutral -Difficult -Very Difficult (anime)-Flash Animation
A4 size paper
Heart
(anime)
Post Card Case
(anime)
Envelope
(anime)
Sack
(anime)
A5 size paper
Bamboo shoot
(anime)
A Card case with Samurai Hat
(anime)