Daiso is a great place to source for craft materials. 

If you would like to reserve an item, you just need the code number and the staff would be happy to put it aside for you.

These are the outlets in Singapore.
NORTH

Sembawang Shopping Centre (Tel: 6484 3418)

SOUTH
Chinatown Point (Tel: 6702 0042) 
City Square Mall (Tel: 6509 9535)
Ion Orchard (Tel: 6634 7801)
Plaza Singapura (Tel: 6884 9210)
Vivocity (Tel: 6376 8065)

EAST

Tampines 1 (Tel: 67851179)
Rivervale Mall (Tel: 6384 3040)

WEST
Bukit Panjang Plaza (Tel: 6766 1677)
IMM (Tel: 6566 9585)

* Last updated on 18 Aug 2013.

(P.S. You can also find these phone numbers on the back of your Daiso receipt)