It has long been discussed that the Stupas need altars for offerings. Currently, the only one with such an arrangment is the Long Life Stupa.

Generally it is not considered auspicious to place offerings on the Stupa itself. Thus far we've left this kind of work for a time when the Stupas themselves are either in the condition we hope for, or, as is the case now, weather prevents us from continuing our efforts towards that goal. With winter solidly here, we've begun to gather our long list of back burner items for review. One of the things we found that we could address during these cold months is the creation of altars for the Stupas. Norbu suggested a composite type decking material, as it would be more durable than wood, but less cumbersome than concrete. Though I was at Lowe's for painting related items, I couldn't help but check out the options. Here's a look...It isn't wood, so won't rot or attract insects like wood, but will take paint, can be sanded and such...