Instructions
Enter West Clock Town from Termina Field. Turn right and walk past the shops until you reach the last shop on your right, which is the Curiosity Shop.
Enter the Curiosity Shop and press "A" to speak to the shopkeeper. Scroll through the items with the directional stick until you locate your items. Press "A" to select and confirm your purchase.
Play the "Song of Time" on your ocarina to return to the first day at dawn. Any uncompleted dungeons will reset, so only do this if you cannot afford to buy the items back from the shop. Link loses rupees, keys and other minor items collected since the last game save.