Modern Druids do not have a guidebook that says "this is how you Druid." All we have is self exploration and looking at history as best we can. We don't know exactly what the Druids of old did, all we can do is go with what our intuition says and work with the energies we have. Since we don't have any true written history of what tools Druids used and how they used them, it's been more of a looking at the lore and deciding what seems logical. In my practice I don't go overboard with tools and things. The simpler the better. There are several resources out there that go into detail about the tools I will speak on, and may talk of other tools. This is just to give you an idea of what I use. (I will attach images to give you a visual. Some of them are mine, others are ones found or shown to me.)
Staff - Most often made from wood, the staff is used for protection or setting your space. If you stick it in the ground, you can use the shadow to give you a precise area of measurement. The staff can also be used to keep records by carving things into it. Most practically, though, it is used whilst walking through the woods. Making your own staff /finding it is great. While going for a walk in the forest, see if there is a branch that calls out to you. However, never take it without asking permission, thanking the tree, and leaving an offering. You can decorate the staff with crystals, antlers, twine, paint... or leave it natural. Each staff is unique to its owner. Before using it, cleanse it so that it is ready to bond fully with you. Your staff will store your energy and align to it. Make sure you spend time with it - meditate and take it out walking with you. Your staff can be made very intricate, or plain and simple. No matter what it looks like, it will become an extension of you.
Dagger or Sickle - In lore, it was written that a Druid used a golden sickle. As we do not have concrete historical evidence of this, you can choose to stay with lore and use a sickle, or just use a dagger... or even a knife. The main need of these tools is to have something sharp to cut things - fairly simple, right? Out in the woods foraging and need to cut something free? Grab your dagger/sickle/knife. In choosing your desired sharp tool, make sure that it calls to you. Once you acquire it, cleanse it, and bring it along with you so that you can bond with it as well.
Silver Branch/Silver - Symbolizing the Upper World, this tool is used for ceremonies, rituals, and otherworldly traveling. Typically shaped from the branch of an apple tree, this tool will have bells attached to it. Whereas there is no set number of bells, some prefer 3 or 9. This is whatever feels right to you. Shake the branch so that the bells ring out and this can aid in getting you into your trance/meditation state so that you can travel.

