I just put my baby daughter down in the garden and saw two 'drill' holes in the lawn (patchy). They each had a tiny pile of earth shovelled outside and I saw a wasp crawl in (the hole was wasp sized). The wasp was then 'waiting' at the entrance, and I saw another wasp hovering nearby. Is this a wasp nest? I'm alarmed as I not only put my daughter down there earlier and didn't notice, but we have friends with small children coming for the weekend. Is there anything I can do? Are there likely to be more or would they be together? Thank you!