Non-Religious Christening/Baby Blessing?

Hi Ladies!

My SO and I are non-religious. Both families come from different Christian faiths (supportive of us) and it’s traditional to have a christening or baby blessing as a new born. I’m interested in something where our families can come and give their prayers, mantras, kind thoughts. I’d love to do something connected to nature as well. Like a short little ceremony of love type thing. Anyone out there do a gathering of some type to send love like this? I’d love your experiences or input. TIA!