How much for gift card? Please help!

I carpool with my neighbor to send and pick up kids (she has two and I have one). I send them to school in the morning and she picks them up in the afternoon. The afternoon one is more complicated than the morning ride, because sometime she has to go twice due kids have different activities at school. I would like to send her a gift card to express my thanks to carpool with me. How much is the right amount to put on the gift card. We have school from Sept to June (10 months). 

所有跟帖： 

• $100 to show your appreciation. -Rockeymountain- ♀ (0 bytes) () 12/14/2010 postreply 18:27:15

• is $100 enough? -Victoria000- ♀ (0 bytes) () 12/14/2010 postreply 18:30:04

• 你们是互相帮忙，她付出多谢。可以另送她俩孩子礼物就很好。 -Rockeymountain- ♀ (0 bytes) () 12/14/2010 postreply 18:34:26

• 送礼物是表心意, 如果你觉得她为你付出劳动, 不如直接送钱. 磅100刀的卡, 会不会太唐突呢? -偶尔峥嵘- ♀ (0 bytes) () 12/14/2010 postreply 18:57:04

• 磅 = 送 -偶尔峥嵘- ♀ (0 bytes) () 12/14/2010 postreply 18:57:37