For a Jain house blessing / housewarming (Grih Pravesh), choose something simple, ahimsa-based and spiritually uplifting. Some good options:

1. Spiritual gifts

• Jain books (Navkar mantra book, Samayik book, Tattvarth Sutra in simple language, story books on Tirthankars).
• Framed Navkar Mantra, Jain Om, Swastik, or Jain Prateek Chihna.
• Small, simple idol or photo of a Tirthankar (Mahavir, Parshvanath, etc.) for their ghar-ka-derasar.

1. Puja / mandir items

• Puja thali (steel/silver/bronze), diya, incense holder, bell (ghanti).
• Clean, plain asan or chowki for mandir (avoid silk, leather).

1. Ahimsa & eco-friendly gifts

• A non-thorny indoor plant (with the understanding it should be cared for gently).
• Eco-friendly home items (steel bottles, cloth bags, clay diyas, etc.).

1. Sattvic food gifts

• Dry fruits or sweets that are strictly Jain:

- No egg, no gelatin, no alcohol. - Preferably also without onion/garlic, and as per their family’s strictness (some avoid all root vegetables, honey, etc.).

1. Charity in their name

• Quietly donate to a Jain temple, pathshala, gaushala, panjrapole or jeevdaya trust in their name and just inform them humne aapke ghar ke shubh avsar par daan kiya hai.

Things to avoid

• Leather, silk, wool, or anything involving himsa.
• Alcohol, non-veg, eggs, or showy / very luxurious items that encourage parigrah (hoarding).

You can see more Jain housewarming gift ideas here