Haan, pooja (worship) can be done without any dravya (external materials) by using bhavna (mental devotion) and pure intention. In Jain dharma, internal practice is very important, and you can connect deeply with Tirthankaras even without idols, flowers, lamps, or other offerings.

Simple way to do pooja without dravya

• Prepare the mind: Sit in a quiet place, relax the body, and take a few deep breaths. Resolve a sincere intention to worship with non-violence, truth, and compassion.
• Focus on a Tirthankara or Jain ideal: Visualize the form (or simply imagine the qualities) of a Tirthankara like Mahavira. Reflect on their virtues—ahimsa (non-violence), satya (truth), aparigraha (non-attachment), cleanliness of conduct, and spiritual conquest.
• Chant or recall mantras: You can quietly recite the Namokar Mantra (Namokāra Manuṣya), or any short prayer in your own words praising the Tirthankaras and expressing gratitude for their guidance.
• Bhavna (mental offering): With a warm heart, offer your thoughts to the Tirthankaras:

- I seek protection from misdeeds and selfish actions. - I vow to cultivate right conduct, right faith, and right knowledge. - I pray for the welfare of all beings and to overcome anger, pride, deceit, and greed within me.

• Remembrance and resolve: Think about one personal change you want to make today—like practicing more self-control, speaking kindly, or avoiding violence in thought, word, and deed. Make a simple commitment to live by that resolution.
• Conclude with gratitude and peace: End with a short note of thanks to the Tirthankaras for showing the path and a wish for all beings to be free from suffering and harm.
• Optional practices to deepen without dravya:

- Practice a short samayik (meditative restraint) focusing on equanimity. - Do pratikraman (confession and repentance) mentally, reflecting on wrongdoings and resolving to improve. - If you have time, perform a few minutes of silence or a gentle breathing practice to cultivate inner calm.

Notes on Digambar and Shwetambar differences

• The core idea of pooja without dravya—honoring the Tirthankaras through inner devotion, ethics, and reflection—is common to both traditions.
• Some communities may emphasize different forms of external ritual when dravya is used, and their prayers or phrasing might vary. When you choose to do bhavna-based pooja, you’ll typically follow the same spirit of reverence and self-improvement in both traditions.

If you’d like, I can provide a short, ready-to-read bhavna text you can recite or a simple Namokar-focused routine tailored to your preferred duration.