For kids: Help build a giant spider web! Learn about and make one of nature’s intricate designs: the spider web! Meet at the Thoreau house replica near the parking lot. All are welcome! Children must be accompanied by an adult. This is a free program, but there is a parking fee of $8 per vehicle with Massachusetts plates, $10 with non-Massachusetts plates. No dogs are permitted unless they are working guides. Park programs are sponsored by MA-DCR. For more information, call (978) 369-3254.