The note of thanks, the invitation, plus a farm gift pack of a pumpkin and fanciful gourds, either picked up when you visit or delivered to your home (within driving distance), OR a seed assortment mailed to your home.
The note of thanks, the invitation, the farm gift pack or the seed assortment, AND the naming rights to a chicken of your choice ("adopt a chicken" with photos and updates provided each season... really!).
The note of thanks, the invitation, plus an assortment of 20 seedlings for your garden, delivered to your home (for local folks) OR a one-hour vegetable gardening consultation with Sheri via phone (for those far away).